Camino doesn't have its own, built-in RSS reader. I don't care about that myself -- I use Google Reader. But if you prefer your browser and RSS reader to be a single unit, then you'll be disappointed with Camino. And Camino's tool for automatically subscribing to RSS feeds will only work with desktop feed-readers. You can't set it to automatically subscribe to a Web-based feed reader, like Google Reader. On the other hand, Web-based feed-readers generally offer bookmarklets and other tools to automate subscriptions.
Some Gmail is formatted poorly in both Camino and Firefox. In particular, I get a lot of e-mail from inside Second Life that goes to my Gmail account, and the text of the messages don't fit the width of the screen. I have to scroll right to read it all.
I miss the del.icio.us and TinyURL Firefox extensions; I use them all the time. There are workarounds in Camino, but they're not as satisfactory. To bookmark a site in del.icio.us, I now need to use Pukka, which costs $12 (the del.icio.us Firefox extension is free).
To make TinyURLs, I've found a TinyURL system service, which, when used in conjunction with Quicksilver, can be invoked form the keyboard.
Which Browser Is Best?
Camino, Firefox, and Safari are all fine browsers. Which one you choose will depend on personal preference.
In my opinion, Safari is not quite as good as Camino. On the other hand, Camino isn't so much better than Safari that it's worth switching. If you've been using Safari all this time and you're not particularly dissatisfied, Camino won't impress you enough to make you want to switch.